OK, so call me a Dummy!
I deserve it.
Because of my Celiac's, I have a severe vitamin B deficiency; Short story, I'm worse than the Absent Minded Professor at times.
What I was looking for in that "Canny aftertaste" was from KIRIN BEER! NOT Asahi, NOT Sapporo - And hell, it's been decades since I lived there, anyway.
Is it their hops, is it rice, what is the key?